CN111468250A - Low-speed steel ball-milling sectional type ball feeding device and method - Google Patents
Low-speed steel ball-milling sectional type ball feeding device and method Download PDFInfo
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- CN111468250A CN111468250A CN202010507835.1A CN202010507835A CN111468250A CN 111468250 A CN111468250 A CN 111468250A CN 202010507835 A CN202010507835 A CN 202010507835A CN 111468250 A CN111468250 A CN 111468250A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/18—Details
- B02C17/20—Disintegrating members
- B02C17/205—Adding disintegrating members to the tumbling mill
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Abstract
The invention discloses a sectional ball adding device and a sectional ball adding method for a low-speed steel ball mill, which comprise a large ball container, a small ball container and a ball adding pipeline, wherein the large ball container and the small ball container are arranged side by side, the ball adding pipeline is arranged at the lower parts of two ball containing containers, the output ports of the large ball container and the small ball container are connected with the input ports of the ball adding pipeline, and the output port of the ball adding pipeline leads to the inside of a coal mill. Calculating the consumption of steel balls in each day according to the raw coal quantity ground by a coal grinder, and adding large steel balls and small steel balls in sections according to a preset proportion. According to the invention, by changing the ball adding mode, under the condition of a certain current of the coal mill, the fineness of the coal powder reaches R90=10% or less, and the uniformity index reaches 1.1. When the pulverized coal demand is constant, the invention can reduce the consumption of raw coal, reduce the consumption of steel balls, improve the burnout performance, save energy and protect environment. The invention has low cost and easy realization, and has important value for improving the working efficiency of the coal mill of the thermal power plant.
Description
Technical Field
The invention relates to a ball adding device and method of a coal mill in a thermal power plant, in particular to a sectional type ball adding device and method for low-speed steel ball milling.
Background
The steel ball coal mill of the thermal power plant mainly has the function of crushing raw coal into pulverized coal with certain fineness, and conveying the pulverized coal into a hearth for combustion. The principle is that a steel ball in the coal mill is driven to a certain height in a cylinder through a transmission device and then falls down to smash and grind raw coal into coal powder. The first ball loading after commissioning or overhaul is that the big, medium and small balls are loaded according to a certain proportion. The large ball has large volume, heavy weight, large inertia, high lifting height of the cylinder in the mill, strong capability of crushing raw coal particles, small ball volume, large number, large surface area and strong capability of grinding coal powder.
The conventional device is to add large balls (50 mm-60mm in diameter) periodically during the operation of the unit, and it is generally considered that the large balls become smaller in diameter and naturally form small balls as they are consumed by abrasion in the mill for a period of time. By analyzing long-term operation data, according to the traditional device and method, large balls are added in the unit operation, the consumption of the steel balls is 155 g/ton of coal, the ball consumption is higher, and the pulverized coal fineness is R90=10-12%, the uniformity index is 0.95, and the burnout performance of the ground anthracite is influenced. The analysis reasons mainly include unbalanced proportion of large balls and small balls in the mill, high consumption of steel balls due to excessive large balls, small proportion of small balls, low grinding capacity and influence on fineness and uniformity of coal powder.
Disclosure of Invention
The invention provides a sectional ball adding device and method for a low-speed steel ball mill, aiming at solving the problem of unbalance proportion of large balls and small balls in the mill.
The invention discloses a sectional ball adding device for a low-speed steel ball mill, which adopts the following technical scheme:
the sectional ball adding device for the low-speed steel ball milling is characterized by comprising a large ball container, a small ball container and a ball adding pipeline, wherein the large ball container and the small ball container are placed side by side; the ball adding pipeline is arranged at the lower parts of the two ball containers and is respectively connected with the output ports of the large ball container and the small ball container, and the output port of the ball adding pipeline leads to the inside of the coal mill; the ball feeding device further comprises a microcontroller, an electric valve is respectively connected between the output port of the large ball container and the output port of the small ball container and the input port of the ball feeding pipeline, the microcontroller is connected with the two electric valves, and the microcontroller controls the opening and closing of the two electric valves according to the set required ball feeding quality.
Furthermore, the diameter of the large steel ball is 60mm, and the diameter of the small steel ball is 30 mm.
The ratio of the ball output quantity of the large ball container to the ball output quantity of the small ball container in unit time is 1: 8.
The invention discloses a sectional ball adding method of a low-speed steel ball mill, which applies the sectional ball adding device of the low-speed steel ball mill and comprises the following steps:
s1: calculating the steel ball consumption weight of each day according to the raw coal quantity ground by a coal grinder, wherein the steel ball consumption is equal to the raw coal consumption multiplied by the steel ball weight required by each ton of raw coal;
s2: opening an electric valve of the large ball container through a microcontroller, and adding large steel balls with half of consumption amount and mass;
s3: and opening an electric valve of the small ball container through the microcontroller, and adding small steel balls with half of the consumption amount.
The invention achieves the following beneficial effects:
1. according to the invention, by changing the ball adding mode, under the condition of a certain current of the coal mill, the fineness of the coal powder reaches R90=10% or less, and the uniformity index reaches 1.1.
2. When the pulverized coal demand is constant, the invention can reduce the consumption of raw coal, reduce the consumption of steel balls, improve the burnout performance, save energy and protect environment.
3. The invention has low cost and easy realization, and has important value for improving the working efficiency of the coal mill of the thermal power plant.
Drawings
Other features and advantages of the invention will be apparent from the following description of the preferred embodiments of the invention, taken in conjunction with the accompanying drawings and from the claims. Individual features of the different embodiments shown in the figures may be combined in any desired manner in this case without going beyond the scope of the invention. In the drawings:
FIG. 1 is a diagram of the apparatus of the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example (b):
as shown in fig. 1, in this embodiment, a low-speed steel ball mill sectional type ball feeding device includes a large ball container 1, a small ball container 2 and a ball feeding pipeline 3, where the large ball container 1 and the small ball container 2 are placed side by side, the ball feeding pipeline 3 is disposed at the lower part of the two ball containers, the output ports of the large ball container 1 and the small ball container 2 are connected to the input port of the ball feeding pipeline 3, and the output port of the ball feeding pipeline 3 leads to the inside of a coal mill 6.
Furthermore, the ball adding device also comprises a microcontroller 4, an electric valve 5 is respectively connected between the output ports of the large ball container 1 and the small ball container 2 and the input port of the ball adding pipeline 3, and the microcontroller 4 is connected with the electric valve 5. The diameter of the large steel ball is 60mm, and the diameter of the small steel ball is 30 mm. The microcontroller 4 controls the opening and closing of the two electric valves 5 according to the set required ball adding quality. The ratio of the ball output quantity of the large ball container 1 to the ball output quantity of the small ball container 2 in unit time is 1: 8.
The specific use mode of the low-speed steel ball milling sectional type ball adding device is as follows: firstly, calculating the consumption of steel balls in each day according to the raw coal quantity ground by a coal grinder 6, wherein the consumption of the steel balls is equal to the raw coal consumption multiplied by the weight of the steel balls required by each ton of raw coal; then the microcontroller 4 controls the opening and closing of the two electric valves 5, and the large steel balls and the small steel balls are added in sections, so that the ball output of the large balls and the small balls is 1:8, and the total mass is equal to the consumption of the steel balls.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (5)
1. The sectional ball adding device for the low-speed steel ball milling is characterized by comprising a large ball container, a small ball container and a ball adding pipeline, wherein the large ball container and the small ball container are placed side by side; the ball adding pipeline is respectively connected with the output ports of the large ball container and the small ball container, and the output port of the ball adding pipeline is communicated to the inside of the coal mill; the ball feeding device further comprises a microcontroller, an electric valve is respectively connected between the output port of the large ball container and the output port of the small ball container and the input port of the ball feeding pipeline, the microcontroller is connected with the two electric valves, and the microcontroller controls the opening and closing of the two electric valves according to the set required ball feeding quality.
2. The segmented ball feeding device for the low-speed steel ball mill as claimed in claim 1, wherein the diameter of the large steel ball is 60mm, and the diameter of the small steel ball is 30 mm.
3. The segmented ball feeding device for the low-speed steel ball mill as claimed in claim 1, wherein the ratio of the number of balls discharged per unit time of the large ball container to the small ball container is 1: 8.
4. A low-speed steel ball-milling sectional ball-adding method, which uses the low-speed steel ball-milling sectional ball-adding device as claimed in any one of claims 1 to 3, and is characterized by comprising the following steps:
s1: calculating the weight consumption of the steel ball every day according to the raw coal quantity ground by the coal grinding machine;
s2: opening an electric valve of the large ball container through a microcontroller, and adding large steel balls with half of consumption amount and mass;
s3: and opening an electric valve of the small ball container through the microcontroller, and adding small steel balls with half of the consumption amount.
5. The segmented ball feeding method for the low-speed steel ball mill according to claim 4, wherein the steel ball consumption calculation method of the step S1 is as follows: the steel ball consumption is equal to the raw coal consumption multiplied by the steel ball weight required per ton of raw coal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010507835.1A CN111468250A (en) | 2020-06-05 | 2020-06-05 | Low-speed steel ball-milling sectional type ball feeding device and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010507835.1A CN111468250A (en) | 2020-06-05 | 2020-06-05 | Low-speed steel ball-milling sectional type ball feeding device and method |
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| CN111468250A true CN111468250A (en) | 2020-07-31 |
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| CN202010507835.1A Pending CN111468250A (en) | 2020-06-05 | 2020-06-05 | Low-speed steel ball-milling sectional type ball feeding device and method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114471845A (en) * | 2022-02-15 | 2022-05-13 | 福建长泰万泰矿物制品有限公司 | Silica grinding method |
| CN115337999A (en) * | 2022-08-29 | 2022-11-15 | 河北西柏坡第二发电有限责任公司 | Calculation method for steel ball amount periodically replenished by steel ball coal mill |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87107400A (en) * | 1986-12-13 | 1988-06-29 | 日挥株式会社 | Automatic ball supplying device of ball mill |
| CN101036902A (en) * | 2007-03-30 | 2007-09-19 | 昆明理工大学 | The method of accurate loading-and-filling ball of two sections of milling mine |
| CN104689888A (en) * | 2013-12-09 | 2015-06-10 | 珠海市华远自动化科技有限公司 | Method for dynamically measuring material quantity, steel ball quantity and material-to-ball ratio in barrel of ball mill |
| CN106582967A (en) * | 2016-12-14 | 2017-04-26 | 上海发电设备成套设计研究院 | Steel ball supplementing method for double-inlet and double-outlet coal mill |
| CN207467658U (en) * | 2017-10-16 | 2018-06-08 | 大唐华银株洲发电有限公司 | Raw coal Hatch Opening control device |
-
2020
- 2020-06-05 CN CN202010507835.1A patent/CN111468250A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87107400A (en) * | 1986-12-13 | 1988-06-29 | 日挥株式会社 | Automatic ball supplying device of ball mill |
| CN101036902A (en) * | 2007-03-30 | 2007-09-19 | 昆明理工大学 | The method of accurate loading-and-filling ball of two sections of milling mine |
| CN104689888A (en) * | 2013-12-09 | 2015-06-10 | 珠海市华远自动化科技有限公司 | Method for dynamically measuring material quantity, steel ball quantity and material-to-ball ratio in barrel of ball mill |
| CN106582967A (en) * | 2016-12-14 | 2017-04-26 | 上海发电设备成套设计研究院 | Steel ball supplementing method for double-inlet and double-outlet coal mill |
| CN207467658U (en) * | 2017-10-16 | 2018-06-08 | 大唐华银株洲发电有限公司 | Raw coal Hatch Opening control device |
Non-Patent Citations (1)
| Title |
|---|
| B.A别罗夫: "《选矿厂分级工与磨矿工读本》", 31 December 1956, 冶金工业出版社 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114471845A (en) * | 2022-02-15 | 2022-05-13 | 福建长泰万泰矿物制品有限公司 | Silica grinding method |
| CN114471845B (en) * | 2022-02-15 | 2023-02-10 | 福建长泰万泰矿物制品有限公司 | Silica grinding method |
| CN115337999A (en) * | 2022-08-29 | 2022-11-15 | 河北西柏坡第二发电有限责任公司 | Calculation method for steel ball amount periodically replenished by steel ball coal mill |
| CN115337999B (en) * | 2022-08-29 | 2023-10-20 | 河北西柏坡第二发电有限责任公司 | Method for periodically supplementing steel ball for steel ball coal mill |
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